They said they wanted to protect us and the rest of the world and said that Iraq had weapons of mass destruction.
But when USA invaded Iraq they could not find any such weapons. The war is based on a lie, also the war in Afganistan.
In this video George W. Bush jokes about weapons of mass destruction. (He could not find them.)
http://www.youtube.com/watch?v=f_tFKa2_YBQ